Monocotyledon-like Leaves from the Middle Jurassic of East Siberia (Russia)
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Monocotyledon-like Leaves from the Middle Jurassic of East Siberia (Russia)
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We are grateful to Marina M. Maslennikova and Viktor I. Yegorov for help with working on a FEI Company Quanta 200 scanning electron microscope (The Shared Research Facilities for Physical and Chemical Ultramicroanalysis, Limnological Institute SB RAS, Irkutsk). We wish to thank Sergey G. Kazanovsky (Herbarium of Siberian Institute of Plant Physiology and Biochemistry SB RAS) and collaborators of the Greenhouse of SIPPB SB RAS (Irkutsk, Russia). Sincere thanks are due to Nina S. Probatova (Federal Center for Biological Diversity of Terrestrial Biota of East Asia, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia) and Violetta V. Kotseruba (Botanical Institute of the Russian Academy of Sciences, St. Petersburg, Russia) for some living and herbarium material of monocotyledonous plants for the preparation of epidermal microslides. Special thanks are extended to Josh Jenkins Shaw (Beijing, China) for correction of the English text of the manuscript.

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    Abstract:

    Leaf fragments of Herbifolia antiqua A. Frolov et Enushchenko gen. et sp. nov. from the Middle Jurassic (Aalenian) of the Irkutsk Coal Basin (Eastern Siberia, Russia) are reported. The following features are characteristic of H. antiqua gen. et sp. nov.: the presence of leaf sheaths, linear smooth-edged leaves with parallel venation, anastomoses between the veins, anomocytic stomata, rhomb-shaped ordinary epidermal cells. Such a combination of characters is widespread in modern monocotyledonous plants and is absent in fossil and modern cryptogam and gymnosperms. Due to the lack of evidence of an enclosed ovule in H. antiqua gen. et sp. nov.we attribute it to a typological angiosperm, based on its unique leaf structure characteristic of monocotyledons. The leaf epidermal structure of Herbifolia gen. nov. is most similar to those of modern Asparagales and Liliales.

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Andrey FROLOV, Ilya ENUSHCHENKO.2022. Monocotyledon-like Leaves from the Middle Jurassic of East Siberia (Russia)[J]. ACTA GEOLOGICA SINICA(English edition),96(6):1884~1896

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  • 收稿日期:2021-10-13
  • 最后修改日期:2022-06-20
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  • 在线发布日期: 2022-12-28
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